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How to select the nth row in a SQL database table?
...ite added window functions support in version 3.25.0 on 2018-09-15 so both forms also work in SQLite.
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Save image from URL by paperclip
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This is the most performant answer (by far). I am not really a performance-geek, but this really adds up if you are working w/ large files.
– Chip
Sep 23 '13 at 23:50
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Are GUID collisions possible?
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Down vote because, in principle (in it's rawest form), you are wrong saying "no" to the question "Are GUID collisions possible?". It's very possible. The likelihood of which is tiny, but it's possible. I hate to sound pedantic - but SO is all about being concise and accura...
Case insensitive 'in'
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Prefer to lower all keys when building the dict, for performance reasons.
– Ryan
May 1 '13 at 6:27
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machine learning libraries in C# [closed]
... really isn't that good a choice. They don't use partial classes for their forms (makes it hard to read the code behind their samples), and i can't find decent documentation for it.
– RCIX
Oct 26 '09 at 10:58
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How do I split a string so I can access item x?
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@FactorMystic First Normal Form requires that you not put multiple values in a single field. It's literally the first rule of an RDBMS. A SPLIT() function is not supplied because it encourages poor database design, and the database will never be optimi...
Using -performSelector: vs. just calling the method
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Basically performSelector allows you to dynamically determine which selector to call a selector on the given object. In other words the selector need not be determined before runtime.
Thus even though these are equivalent:
[anObject ...
Bash script to calculate time elapsed
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You can use Bash's time keyword here with an appropriate format string
TIMEFORMAT='It takes %R seconds to complete this task...'
time {
#command block that takes time to complete...
#........
}
Here's what the reference says about TIMEFORMAT:
The value of this param...
How to change line color in EditText
...ed that, if you use the appcompat library EdtiTexts are automatically transformed into AppCompatEditText and the background tint applied.
– stephane k.
Apr 30 '17 at 17:03
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How to remove the left part of a string?
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But also throws if your input isn't all in the form "something=somethingelse".
– Dan Olson
Mar 1 '09 at 22:17
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